I don't know any software that can play chunked content without any manifest file (the first command doesn't generate one) although FFmpeg can handle that after adding "-live 1" to input parameters, but I don't want to do that because it's not a live stream.

Sorry if I misunderstand: Didn't you report that by modifying some available instruction you can generate a file with FFmpeg that FFmpeg isn't able to read? And now you explain that nothing can play the resulting file?